HardLabs

Octobot

Deivid-Negoita·octobot·hardware/octobot-controller.kicad_pcb

Octobot PCB layout, top view — open source AVR/Arduino board by Deivid-Negoita
Simulate this board

About the Octobot PCB

Octobot is an open source AVR/Arduino PCB design by Deivid-Negoita, published on GitHub under the MIT license. It is a 4-layer board measuring 124 × 23 mm, with 120 components from 33 distinct parts.

Its main chip is the ATMEGA32U4-M, from the AVR/Arduino family. Other key parts include the SY8303AIC, PCA9685PW/Q900_118 and AVR-ISP. By type, the board carries 54 resistors, 34 connectors, 17 capacitors, 5 ICs, 4 diodes and 3 switches.

It belongs with the robotics & motion, rf & radio and power & battery designs in this gallery.

From the project

An eight-legged walking robot I built end to end: chassis CAD, a 24-servo ATmega32U4 controller board, the firmware, and a browser IK workbench you can drive it from.

An eight-legged walking robot with 24 servos, built end to end. The chassis and legs are CAD. A custom ATmega32U4 board drives every servo. A browser workbench rigs the CAD model and solves its inverse kinematics.

The workbench runs live in the browser: . It needs no install and no build step.

The robot carries environmental-monitoring, 3D-scanning and speleological payloads. Those payloads need the legs to place feet accurately on uneven ground, which a fixed gait cannot do. The kinematics workbench in this repository exists to solve that.

Octobot, from the project README
From the project README

Main components on the Octobot

SY8303AICPCA9685PW/Q900_118ATMEGA32U4-MAVR-ISP

Octobot bill of materials (BOM)

120 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SY8303AIC
IC1
2
PCA9685PW/Q900_118
U1, U2
1
ATMEGA32U4-M
ATmega32U4-M
U3
1
AVR-ISP
U4
1
RQ3E075ATTB
Q1
1
CRYSTAL_GND24
Crystal_GND24
Y1
1
47346-0001
J1
28
CONN_01X03_PIN
Conn_01x03_Pin
J2, J3, J4, J5, J6, J7, J8, J10 +20
4
1X2
1x2
J9, J16, J31, J34
1
CONN_01X04_PIN
Conn_01x04_Pin
J15
2
TL3365AF180QG
S1, S2
1
DS04-254-2-03BK-SMT
S3
3
LED
D1, D3, D4
1
HPZR-C10X
D5
1
7447713047
4,7 uH
L1
2
18PF
18pF
C1, C3
2
1UF
1uF
C2, C8
6
10UF
10uF
C4, C5, C18, C19, C22, C23
2
875075161013
C6, C9
1
0.1UF
0.1uF
C7
Show 13 more
QtyPartRefs
1
12 pF
C16
2
0,1uF
C17, C21
1
10NF
10nF
C20
20
10K
R1, R5, R8, R10, R14, R16, R17, R18 +12
2
22 Ohm
R2, R3
1
10KOHM
10KOhm
R4
1
1KOHM
1KOhm
R6
2
1K
R7, R9
1
110K Ohm
R11
1
15K Ohm
R12
1
100K Ohm
R13
1
100K
R15
24
220 Ohm
R31, R32, R33, R34, R35, R36, R37, R38 +16

Octobot design files

The KiCad project lives in the Deivid-Negoita/octobot repository on GitHub; these links point at the commit this page was built from.

Octobot: common questions

What microcontroller does the Octobot use?

The Octobot is built around the ATMEGA32U4-M, from the AVR/Arduino family.

How big is the Octobot PCB?

The Octobot measures 124 × 23 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Octobot?

120 components, from 33 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Octobot design files?

From the Deivid-Negoita/octobot repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Octobot design in my own project?

Yes, under the terms of its MIT license, which Deivid-Negoita chose for the repository.

Can I test firmware for the Octobot without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

Similar boards